Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A drive compensation circuit, comprising a first power supply terminal, a second power supply terminal, a drive circuit, a voltage detection circuit and an organic light emitting diode (OLED), wherein the drive circuit comprises an input terminal and an output terminal, the OLED comprises an anode and a cathode, the input terminal of the drive circuit is electrically connected to the first power supply terminal, the anode of the OLED is electrically connected to the output terminal of the drive circuit, the cathode of the OLED is electrically connected to the second power supply terminal, an input terminal of the voltage detection circuit is electrically connected to a first node between the anode of the OLED and the output terminal of the drive circuit, and the voltage detection circuit is configured to obtain a voltage value of the anode of the OLED, the first power supply terminal is configured to enable a first output voltage of the first power supply terminal to be larger than a second output voltage of the second power supply terminal, and the second power supply terminal is configured to allow the second output voltage of the second power supply terminal to be adjusted according to the voltage value of the anode of the OLED.
This invention relates to a drive compensation circuit for organic light emitting diode (OLED) displays, addressing voltage variations that degrade display performance. The circuit includes a drive circuit, a voltage detection circuit, and an OLED. The drive circuit, connected between a first power supply terminal and the OLED's anode, provides current to the OLED. The voltage detection circuit monitors the anode voltage of the OLED and adjusts the second power supply terminal's output voltage accordingly. The first power supply terminal maintains a higher voltage than the second, ensuring proper OLED operation. By dynamically adjusting the second power supply voltage based on detected anode voltage, the circuit compensates for voltage drops or fluctuations, improving display stability and efficiency. The system ensures consistent OLED performance by maintaining optimal voltage conditions, addressing issues like brightness variations and power inefficiencies caused by voltage drift. This approach enhances display reliability and extends the lifespan of OLED devices.
2. A drive compensation circuit, comprising a first power supply terminal, a second power supply terminal, drive circuit, a voltage detection circuit and an organic light emitting diode (OLED), wherein the drive circuit comprises an input terminal and an output terminal, the OLED comprises an anode and a cathode, the input terminal of the drive circuit is electrically connected to the first power supply terminal, the anode of the OLED is electrical connected to the output terminal of the drive circuit, the cathode of the OLED is electrically connected to the second power supply terminal, an input terminal of the voltage detection circuit is electrically connected to a first node between the anode of the OLED and the output terminal of the drive circuit, and the voltage detection circuit is configured to obtain a voltage value of the node of the OLED, the first power supply terminal is configured to enable a first output voltage of the first power supply terminal to be larger than a second output voltage of the second power supply terminal, and the second power supply terminal is configured to allow the second output voltage of the second power supply terminal to be adjusted according to the voltage value of the anode of the OLED, wherein the switch circuit comprises a control terminal, a first terminal and a second terminal, the control terminal of the switch circuit is configured to receive a control signal, the first terminal of the switch circuit is electrically connected to the first node between the anode of the OLED and the output terminal of the drive circuit, and the second terminal of the switch circuit is electrically connected to the input terminal of the voltage detection circuit.
This invention relates to a drive compensation circuit for organic light emitting diode (OLED) displays, addressing voltage variations that degrade display performance. The circuit includes a drive circuit, a voltage detection circuit, and an OLED. The drive circuit supplies power to the OLED anode, while the cathode connects to a second power supply terminal. The voltage detection circuit monitors the voltage at the OLED anode to compensate for voltage drops caused by aging or environmental factors. The first power supply terminal provides a higher voltage than the second terminal, ensuring proper OLED operation. The second terminal adjusts its output voltage based on the detected anode voltage to maintain consistent brightness and efficiency. A switch circuit selectively connects the anode to the voltage detection circuit, allowing precise voltage monitoring. This design improves OLED display longevity and performance by dynamically compensating for voltage fluctuations.
3. The drive compensation circuit according to claim 1 , further comprising a voltage adjustment circuit, wherein the voltage detection circuit is further configured to output a detection result, the voltage adjustment circuit is configured to receive the detection result and adjust the second output voltage of the second power supply terminal according to the detection result.
A drive compensation circuit is designed to regulate voltage in electronic systems, particularly where stable power delivery is critical. The circuit addresses the problem of voltage fluctuations that can degrade performance or cause malfunctions in sensitive components. The core of the invention includes a voltage detection circuit that monitors voltage levels and a compensation circuit that adjusts output voltage to maintain stability. The voltage detection circuit generates a detection result indicating the current voltage state. A voltage adjustment circuit receives this detection result and dynamically modifies the second output voltage of a power supply terminal based on the detected conditions. This adjustment ensures that the voltage remains within acceptable limits, compensating for variations in load or environmental factors. The system may also include a current detection circuit to monitor current levels, further enhancing stability by adjusting voltage in response to both current and voltage fluctuations. The overall design aims to provide precise and reliable power delivery, reducing the risk of errors or damage in electronic devices.
4. The drive compensation circuit according to claim 3 , wherein the voltage adjustment circuit is electrically connected to the second power supply terminal, the voltage adjustment circuit comprises a memory circuit and a difference circuit, the memory circuit is configured to store a theoretical voltage value of the anode of the OLED, the difference circuit is configured to get a difference value between the detection result and the theoretical voltage value of the anode of the OLED.
This invention relates to drive compensation circuits for organic light-emitting diode (OLED) displays, addressing issues such as voltage drift and degradation over time. The circuit includes a voltage adjustment mechanism connected to a power supply terminal, which compensates for variations in the OLED's anode voltage to maintain consistent display performance. The voltage adjustment circuit comprises a memory circuit and a difference circuit. The memory circuit stores a predefined theoretical voltage value for the OLED anode, representing the ideal operating condition. The difference circuit compares the actual detected anode voltage (obtained from a detection circuit) against this theoretical value, generating a difference value that quantifies the deviation. This difference value is used to adjust the drive signal, ensuring the OLED operates at the intended voltage level despite aging or environmental factors. The system dynamically compensates for voltage shifts, improving display uniformity and longevity. The memory circuit retains the theoretical voltage reference, while the difference circuit enables real-time correction by calculating the discrepancy between measured and expected values. This approach enhances the accuracy and stability of OLED drive circuits, mitigating the effects of degradation over time.
5. An organic light emitting diode (OLED) display panel, comprising a plurality of pixel units, a first power supply terminal, a second power supply terminal and a voltage detection circuit, wherein each pixel unit of the plurality of pixel units comprises a drive circuit and an OLED, the drive circuit comprises an input terminal and an output terminal, the OLED comprises an anode and a cathode, the input terminal of the drive circuit is electrically connected to the first power supply terminal, the anode of the OLED is electrically connected to the output terminal of the drive circuit, the cathode of the OLED is electrically connected to the second power supply terminal, the plurality of pixel units comprise at least one detection pixel unit, an input terminal of the voltage detection circuit is electrically connected to a first node between the output terminal of the drive circuit and the anode of the OLED in the at least one detection pixel unit, and the voltage detection circuit is configured to obtain a voltage value of the anode of the OLED in the at least one detection pixel unit, the first power supply terminal is configured to enable a first output voltage of the first power supply terminal to be larger than a second output voltage of the second power supply terminal, and the second power supply terminal is configured to allow the second output voltage of the second power supply terminal to be adjusted according to the voltage value of the anode of the OLED in the at least one detection pixel unit.
An organic light emitting diode (OLED) display panel includes multiple pixel units, each containing a drive circuit and an OLED. The drive circuit has an input terminal connected to a first power supply terminal, and its output terminal is connected to the anode of the OLED. The cathode of the OLED is connected to a second power supply terminal. The panel also includes a voltage detection circuit linked to at least one detection pixel unit, specifically between the drive circuit's output and the OLED's anode. This circuit measures the anode voltage of the OLED in the detection pixel unit. The first power supply terminal provides a higher voltage than the second power supply terminal. The second power supply terminal adjusts its output voltage based on the detected anode voltage of the OLED in the detection pixel unit. This design allows for dynamic voltage regulation to optimize display performance and efficiency. The detection pixel unit enables real-time monitoring of OLED anode voltage, ensuring proper operation and longevity of the display panel. The system dynamically adjusts the second power supply voltage to maintain optimal conditions for the OLED devices.
6. The OLED display panel according to claim 5 , further comprising at least one switch circuit, wherein a control terminal of the at least one switch circuit is configured to receive a first control signal, a first terminal of the at least one switch circuit is electrically connected to the first node between the anode of the OLED and the output terminal of the drive circuit in the at least one detection pixel unit, and a second terminal of the at least one switch circuit is electrically connected to the input terminal of the voltage detection circuit.
An OLED display panel includes a plurality of detection pixel units, each containing an OLED with an anode and a drive circuit with an output terminal connected to the anode. A first node is formed between the anode and the output terminal. The panel further includes at least one switch circuit with a control terminal, a first terminal, and a second terminal. The control terminal receives a first control signal to activate or deactivate the switch circuit. When activated, the switch circuit electrically connects the first node to the input terminal of a voltage detection circuit. This configuration allows the voltage at the first node to be measured by the voltage detection circuit, enabling monitoring of the OLED's operating conditions. The switch circuit ensures selective and controlled voltage detection, facilitating diagnostics and performance optimization of the OLED display panel. The drive circuit in each detection pixel unit regulates current flow to the OLED, while the switch circuit provides a means to interface with external detection circuitry for real-time or periodic voltage measurements. This setup enhances the panel's ability to detect anomalies, such as degradation or defects, improving overall reliability and longevity. The voltage detection circuit processes the measured voltage to assess the OLED's health and adjust driving parameters as needed.
7. The OLED display panel according to claim 6 , further comprising a gate drive circuit, wherein the gate drive circuit is configured to output the first control signal to control the at least one switch circuit to be turned on or turned off.
An OLED display panel includes a plurality of pixel circuits, each containing at least one switch circuit and a light-emitting element. The switch circuit is connected to a data line and a power supply line, and is configured to control current flow to the light-emitting element based on a first control signal. The gate drive circuit generates and outputs this first control signal to selectively turn the switch circuit on or off, thereby regulating the current supplied to the light-emitting element and controlling the brightness or activation state of the pixel. This design allows for precise control over individual pixels, improving display performance and efficiency. The gate drive circuit may be integrated into the display panel to minimize signal delay and enhance synchronization between the switch circuits and the overall display operation. The system ensures accurate pixel activation and deactivation, addressing issues related to inconsistent brightness or response times in OLED displays.
8. The OLED display panel according to claim 7 , wherein, the gate drive circuit is further configured to output a second control signal to control the drive circuit of each of the plurality of pixel units.
An OLED display panel includes a plurality of pixel units arranged in an array, each pixel unit having a drive circuit for controlling light emission. The panel also includes a gate drive circuit that outputs a first control signal to control the switching of thin-film transistors (TFTs) within the drive circuit of each pixel unit. The gate drive circuit is further configured to output a second control signal to control the drive circuit of each pixel unit, ensuring precise timing and voltage regulation for stable light emission. The drive circuit may include components such as a storage capacitor, a drive transistor, and a light-emitting element, where the second control signal adjusts the drive transistor's operation to maintain consistent brightness and efficiency. This configuration improves display uniformity and reduces power consumption by dynamically managing the drive current through the OLED elements. The system is particularly useful in high-resolution displays where precise control of pixel emission is critical. The gate drive circuit's dual-signal output enhances synchronization between pixel units, minimizing flicker and improving overall display performance.
9. The OLED display panel according to claim 6 , wherein the OLED display panel comprises a plurality of switch circuits, first terminals of the plurality of switch circuits are respectively electrically connected to nodes between anodes of OLEDs and output terminals of drive circuits in detection pixel units of the plurality of pixel units, second terminals of the plurality of switch circuits are electrically connected to the input terminal of the voltage detection circuit, the plurality of pixel units are arranged in an array, and the detection pixel units are uniformly distributed in the array of the plurality of pixel units.
An OLED display panel includes a plurality of pixel units arranged in an array, with some designated as detection pixel units uniformly distributed across the array. Each detection pixel unit contains an OLED and a drive circuit that controls the OLED's anode voltage. A voltage detection circuit is connected to the detection pixel units via switch circuits. Each switch circuit has a first terminal connected to the node between the OLED anode and the drive circuit output, and a second terminal connected to the voltage detection circuit input. The switch circuits selectively route the anode voltage of the OLEDs in the detection pixel units to the voltage detection circuit for monitoring. This configuration allows for real-time detection of OLED degradation or performance variations by sampling voltages across the display panel, ensuring uniform and accurate voltage measurements. The uniform distribution of detection pixel units ensures comprehensive coverage of the display area, enabling precise detection of localized issues. The system helps maintain display quality by identifying and compensating for voltage irregularities in the OLEDs.
10. The OLED display panel according to claim 6 , further comprising a voltage adjustment circuit, wherein the voltage detection circuit is further configured to output a detection result, the voltage adjustment circuit is configured to receive the detection result and adjust a voltage that is output from the second power supply terminal according to the detection result.
An OLED display panel includes a voltage detection circuit and a voltage adjustment circuit. The voltage detection circuit monitors the voltage at a second power supply terminal, which provides power to the display panel. The voltage adjustment circuit receives the detection result from the voltage detection circuit and dynamically adjusts the voltage output from the second power supply terminal based on this result. This adjustment ensures stable and efficient power delivery to the OLED display, preventing voltage fluctuations that could degrade performance or damage components. The system is particularly useful in high-resolution or high-brightness displays where power stability is critical. The voltage adjustment circuit may include feedback mechanisms to fine-tune the output voltage in real-time, maintaining optimal operating conditions. This design improves reliability and extends the lifespan of the display panel by preventing overvoltage or undervoltage conditions. The integration of detection and adjustment circuits within the display panel allows for autonomous power management without external intervention.
11. The OLED display panel according to claim 10 , wherein the voltage adjustment circuit is electrically connected to the second power supply terminal, the voltage adjustment circuit comprises a memory circuit and a difference circuit, the memory circuit is configured to store a theoretical voltage value of the anode of the OLED in the at least one detection pixel unit, and the difference circuit is configured to get a difference value between the detection result and the theoretical voltage value of the anode of the OLED in the at least one detection pixel unit.
This invention relates to OLED display panels with improved voltage compensation for enhanced display uniformity. The problem addressed is voltage drift in OLED displays over time, which causes brightness and color inconsistencies across the panel. The solution involves a voltage adjustment circuit integrated into the display panel to monitor and correct voltage levels in detection pixel units. The voltage adjustment circuit is connected to a power supply terminal and includes two key components: a memory circuit and a difference circuit. The memory circuit stores a theoretical voltage value for the anode of the OLED in each detection pixel unit, representing the ideal operating voltage. The difference circuit compares the actual measured voltage (detection result) of the OLED anode in the detection pixel unit against the stored theoretical value. By calculating the difference between these values, the circuit identifies voltage deviations that may indicate degradation or drift in the OLED elements. This compensation mechanism allows the display panel to dynamically adjust voltages to maintain consistent brightness and color accuracy, extending the lifespan of the OLED display and improving visual performance. The system is particularly useful in high-resolution or large-area OLED displays where voltage variations are more pronounced.
12. The OLED display panel according to claim 5 , comprising a plurality of voltage detection circuits, wherein the plurality of pixel units comprise detection pixel units, input terminals of the plurality of voltage detection circuits are respectively electrically connected to nodes between output terminals of drive circuits and anodes of OLEDs in detection pixel units of the plurality of pixel units, and the plurality of voltage detection circuits are configured to obtain voltage values of anodes of the OLEDs of the detection pixel units, the detection pixel units are distributed in different areas of the OLED display panel.
An OLED display panel includes a plurality of pixel units, each containing a drive circuit and an OLED. The panel incorporates multiple voltage detection circuits connected to specific nodes between the drive circuit output terminals and the OLED anodes in designated detection pixel units. These detection pixel units are distributed across different areas of the display panel. The voltage detection circuits measure the voltage values at the OLED anodes in the detection pixel units. This configuration enables real-time monitoring of OLED performance, allowing for detection of voltage variations that may indicate degradation or defects in the display. By distributing the detection pixel units across the panel, the system can assess uniformity and reliability across different regions, ensuring consistent display quality. The voltage measurements can be used for diagnostic purposes, calibration, or compensation techniques to maintain optimal performance over time. This approach addresses the challenge of detecting and mitigating OLED degradation, which can lead to uneven brightness or color shifts in the display.
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February 18, 2020
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